Water, as the source of life, is a key element of environmental education. Geography education is strongly linked to the three pillars of sustainable development (SD). Firstly, this paper used the water-related standards of China’s national geography curriculum (GCSs) as the object of textual analysis. Two coders categorized the water-related GCSs, coding them with two distinct dimensions: geography core competencies and the SD literacy framework. Then, the coding results were analyzed by word frequency analysis to compare them with U.S. high school GCSs. Finally, the distribution of core competencies and the degree of SD literacy in China’s water-related GCSs were summarized and described. Finally, this study showed that China’s sustainable water education content is rich in content, yet fragmented. China’s water-related GCSs focus on the three dimensions of ESD, with an emphasis on the environmental dimension. GCSs in both countries emphasize human–Earth relations effectively.